An educational, cited reference for homeowners — not a claim that ClickSeptic services Missouri today. ClickSeptic has zero live markets anywhere yet.
Short answer: Missouri's onsite wastewater treatment systems (OWTS/septic) are regulated under state statute (RSMo Chapter 701) and rules at 19 CSR 20-3, administered by the Missouri Department of Health and Senior Services (DHSS). Authority is split geographically: some counties are administered directly by DHSS, others operate under contract with DHSS, and others regulate under their own local ordinance, per DHSS's published county authority map.
Last updated: September 2026. This page summarizes public Missouri regulatory information for homeowner reference and is not legal advice — always confirm current requirements directly with the state or local agency cited below. ClickSeptic has not launched in any market and has zero operators onboarded anywhere today; this page does not claim ClickSeptic provides service in Missouri or anywhere else.
Missouri's onsite wastewater treatment systems (OWTS/septic) are regulated under state statute (RSMo Chapter 701) and rules at 19 CSR 20-3, administered by the Missouri Department of Health and Senior Services (DHSS). Authority is split geographically: some counties are administered directly by DHSS, others operate under contract with DHSS, and others regulate under their own local ordinance, per DHSS's published county authority map.
Missouri state law does not require an inspection or evaluation of an onsite sewage system before a home sale, according to DHSS's own published guidance. If a lender or buyer requests an inspection, it must be performed by a state-licensed inspector/evaluator under 19 CSR 20-3.070; some individual counties independently mandate a sale-related inspection, but this is not a statewide statutory requirement.
Missouri's DHSS owner's manual for onsite wastewater systems recommends inspecting septic tanks at least every two years and pumping when sludge is within 12 inches of the outlet or scum within 3 inches, but this is agency guidance rather than a codified statewide pumping mandate. One narrow statutory exception exists: RSMo § 249.1155 allows counties within certain watershed improvement districts to require systems be maintained/pumped every five years by a licensed provider with proof submitted to the county or state.
Permit issuance for OWTS depends on county classification: DHSS issues permits directly in some counties, other counties issue permits under contract with DHSS, and some counties permit under their own locally adopted ordinance (which may be stricter than the state minimum). Applicants must consult DHSS's county authority map to determine the correct permitting body for their location.
Missouri's split three-tier permitting structure — direct-DHSS counties, DHSS-contract counties, and locally-ordinance counties — means septic regulatory requirements can differ meaningfully from one county to the next within the same state, a structure DHSS documents via an official statewide authority map.
ClickSeptic is building a nationwide septic service marketplace, market by market. We have no live coverage in Missouri or anywhere else yet — leave your email and ZIP code and we'll tell you the moment that changes.
Get Notified at Launch →